package thread;

public class SyncDemo3 {
    public static void main(String[] args) {
        Foo f1 = new Foo();
        Foo f2 = new Foo();
        Thread t1 = new Thread(){
            public void run() {
                f1.dosome();
            }
        };
        Thread t2 = new Thread(){
            public void run() {
                f2.dosome();
            }
        };
        t1.start();
        t2.start();
    }
}
class Foo{
    public static void dosome(){
        synchronized (Foo.class){
            try {
                Thread t = Thread.currentThread();
                System.out.println(t.getName()+":正在执行dosome方法");
                Thread.sleep(5000);
                System.out.println(t.getName()+"执行完毕");
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
}